Table of Contents
设计场景
应用场景
老式解决方案
新式解决方案
Home Web Front-end HTML Tutorial 自适应内部元素_html/css_WEB-ITnose

自适应内部元素_html/css_WEB-ITnose

Jun 21, 2016 am 08:46 AM

设计场景


  • 如果我们不给元素指定固定的高度(height),它会根据其内容的高度自适应。我们希望宽度(width)也具有类似的行为

应用场景


我们用一幅图来展示实际的应用场景:

perfect.png

分析:

  • 宽度由 内部因素 来决定,而不是由 外部因素 来决定的
  • 水平居中

老式解决方案


  • 代码结构

    <p>文本</p><figure>  <img src="" alt=""    style="max-width:90%" height="" />  <figcaption>标题/描述</figcaption></figure><p>文本</P>
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  • 为了得到正确的宽度,我们给 figure 元素浮动,但却引发了新的问题,整个布局模式改变了

float.png

  • 对figure元素应用 display: inline-block 让它根据内容来决定自身的尺寸,这样虽然可以达到正确的宽度,但在水平居中上却让我们实现起来有点繁琐:我们需要对父元素应用 text-align: cener 属性,然后对不需要居中的子元素都设置 text-align: left 属性

inline-block.png

新式解决方案


figure {    max-width: 502px;    max-width: min-content;    margin: 20px auto;}figure > img {    max-width: inherit;}
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说明:

  • min-content 属性,它获取的是这个容器内部最大的不可断行元素的宽度(最宽的单词、图片或具有固定宽度的元素),在这里起到了很重要的作用
  • 为浏览器的兼容做了一个回退样式

《CSS SECRETS》

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